i started thinking about writing a bug report for this... and while looking at my screen i somehow understood why this issue does not really bother me:

it's a informal good practice to remove all toolbars but the "tools" one (the "real" toolbar : - ) and put it on the left side of the monitor.
among the other toolbars, the only one that is sometimes useful it's the pdf one (and it's only useful if you're creating interactive pdfs).
the command in the other ones can be better reached through the shortcuts or the menus.
i still think, that the buttons could be half as big (at least optionally), but "correctly" configuring scribus will help you getting along : - )